The Sleeper must awaken.
Not illegal in Washington State.
In Washington State you MAY temporarily exceed the posted speed limit if the vehicle in front of you is impeding the normal and reasonable flow of traffic (going too damn slow).
RCW 46.61.425 states:
(1) No person shall drive a motor vehicle at such a slow speed as to impede the normal and reasonable flow of traffic [and] a person following a vehicle driving at less than the legal maximum speed and desiring to pass such vehicle may exceed the speed limit…at only such a speed and for only such a distance as is necessary to complete the pass with a reasonable margin of safety.